Slab-barking machine.



G. ANDERSON.

SLAB BARKING MACHINE. APPLICATION FILED 3,111.24, 1911.

1,009,950. Patented Nov. 28, 1911.

3 SHEBTS-SHEET 1.

Witnesses Inventor y C fi '2 W. Attorneys COLUMBIA PLANOnnAPH $0.. \VAS NNNNNNNN n,

Gr. ANDERSON.

SLAB BARKING MACHINE.

APPLIUATION TILED JAN. 24, 1911.

1,009,950. Patented Nov. 28, 1911.

3 SHEETS-SHEET 2. 9 T

MK) N R Q Witnesses Inventor G. ANDERSON.

SLAB BARKING MACHINE.

APPLICATION FILED JAN. 24, 1911.

1,009,950. Patented Nov. 23,1911.

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Witnesses Inventor Attorneys "nnrrnn srarns PATENT ornion.

GUSTAVE ANDERSON, OF BERLIN MILLS, NEW HAMPSHIRE, ASSIGNOR OF ONE-THIRD T0 RALPH DEXTER AND ONE-THIRD T0 JAMES TAYLOR, OF BERLIN MILLS, NETV HAMPSHIRE.

SLAB-BARKING MACHINE.

rooaeao.

To all whom it may concern:

Be it known that I, GUSTAVE ANDnRsoN, a citizen of the United States, residing at Berlin Mills, in the county of Coos and State of New Hampshire, have invented a new and useful Slab-Barking Machine, of which the following is a specification.

The object of this invention is to provide a machine whereby the bark may be removed from slabs of timber, means being provided whereby slabs of different thicknesses and of different curvatures may be barked by a single machine.

Another object of the invention is to provide means whereby slabs may be treated in a single machine, even though the bark upon the slabs be of different thicknesses.

Another object of the invention is to provide novel means for mounting the cutting or barking mechanism and to provide novel means for adjusting the cutting or barking mechanism, and to provide means for feeding the material through the cutting or barking mechanism.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings,l3igure 1 is a top plan; Fig. 2 is a side elevation; Fig. 3 is a transverse section on the line AB of Fig. 2; and Fig. t is a transverse section on the line CD of Fig. 2. Fig. 5 is a perspective of the tiltable frame together with adjacent parts.

Referring to the drawings, that end of the structure to which the reference character A is applied, will be considered the forward end, while that portion to which the reference character B is applied, will be con sidered the rear end.

The supporting structure embodies a base 1, which may be of any suitable form, the base supporting a feeding table 2. Secured to the table 2 are brackets 3 and 4t, spaced apart lpngitudinally of the machine, the brackets 3 and 4: carrying slidable bearings 5 and 6, respectively. lin the bearings 5 is journaled for rotation a shaft 7, extend- Specification of Letters Patent.

Application filed January 24, 1911.

Patented Nov. 28, 1911.

Serial No. 604,423.

ed transversely of the table 2, a similar shaft 8 being journaled for rotation in the bearings 6. The shaft 7 carries a feed roll 9, located above the table 2, the shaft 8 carrying a feed roll 10, similarly disposed with respect to the table. The shafts 7 and 8 are power driven, as indicated at 11, any suitable means being provided for imparting rotation to the shafts. The feed roll 9 cooperates with idlers 12 and 141, journaled for rotation in spaced relation, in the supporting structure, and beneath the table E2.

Located between the brackets 3 and 1, and depending below the table 2, are brackets 15, rigidly mounted upon the supporting structure. In these brackets are mounted for reciprocation, transversely of the plane of the table 2, bearings 16, carrying for rotation a cutter shaft 17, to which is rigidly secured a head 18, supplied with angularly disposed knives 19, the cutting edges of which are concaved toward the axis of the cutter shaft 17, as shown at 20. The bearings 16 are adjustably held in the brackets 15, and are maintained uplifted by strong compression springs 21, bearing at their up per ends against the members 16, and at their lower ends bearing against the lower extremities of the brackets 15, the concaved cutting edges 20 of the knives 19 operating above the table 2. Any suitable means, in dicated conventionally at 22, may be employed for imparting rotation to the cutter shaft 17.

Pivotally mounted upon the cutter shaft 17 for limited tilting movement in the direction of the longer dimension of the table 2, is a frame 23, supporting a chip breaker 24, and a rear gage 25, the members 2 1 and 25 being positioned, respectively, in front of and to the rear of, the cutter shaft 17 and its knives 19. The upper surfaces of the members 24: and 25 are concaved, as shown at 26.

The frame 23 is equipped with extensions 27, protruding toward the forward end of the table, the extensions 27 being loosely connected, as shown at 28, with arms 29, proj ecting forwardly from a rock shaft 30, journaled for rotation in the supporting structure. The rock shaft 30 is supplied with an outstanding arm 31, pivoted to a connection 32, extended longitudinally of the table 2, the forward end of the connection being pivotally united with an arm 33, secured to and depending from, a rock shaft 34:, journaled for rotation in the supporting structure, adjacent the forward end thereof. The shaft 34 carries an outstanding handle 35, whereby the shaft may be manipulated, this operating handle being equipped with suitable latch mechanism 36, adapted to inter engage with a segment 37, mounted upon the supporting structure.

Fulcrumed at 39, and upwardly curved between its ends as at 39 is a lever 38, disposed longitudinally of the table 2, and mounted for swinging movement in a plane parallel to the plane of the table. The lever 38 is provided at its forward end, with an outstanding handle 40 for its manipulation, the handle carrying suitable latch mechanism 41, adapted to engage with a segment 42, mounted upon the supporting structure.

The operation of the device as hereinbefore described is as follows. A slab with the bark side downwardly disposed, is placed upon the table 2 adjacent the forward end of the table, the slab being advanced beneath the feed roller 9. After the slab has been engaged by the feed roller 9, the latter will advance the slab upon the in clined, concaved face 26 of the chip breaker 24, depressing the frame 23 and causing the cutter shaft 17, together with the bearings 16, to move downwardly in the brackets 15, the springs 21 being put under tension. The knives 19 will thus be held against the lower surface of the slab, and when the cutter shaft 17 is rotated, the knives 19 will cut the bark from the slab, the bark loosened by each knife as it engages the slab, being broken off adjacent the rear face of the forward chip breaker 24. The slab will ultimately be advanced over the rear gage 25 by the cooperating feed rollers 9 and 10.

In order to accommodate slabs having bark portions of different thicknesses, the handle 35 may be manipulated, impart-ing motion to the connection 32, the connection, in its turn, actuating the rock shaft 30 which, through the instrumentality of the arms 29 will tilt the frame 23, thus lowering or raising the chip breaker 2% with respect to the cutting edges 20 of the knives 19, thereby adjusting the thickness of the bark chip which each knife 19 will remove.

It frequently happens that the slabs are of different curvatures upon their bark sides, and in order that slabs of different curvatures may be stripped of their bark by the knives 19, the lever 38 may be swung upon its fulcrum 39. When a slab the curvature of which approximates the curvature of the concaved edges 20 of the knives 19, is to be barked, the slab may be fed through the machine approximately at right angles to the planes of the knives 19. If, however, a slab which has been cut from a tree of relatively small diameter, is to be barked,

the lever 38 may be tilted upon its fulcrum 39, the slab being directed along the inner face of the lever. Under such circumstances, the slab will pass above the knives 19 at an angle to the plane of the said knives, that is, the slab will move from the forward end of the table toward the rear end of the table in a diagonal line. When the slab is thus advanced with respect to the knives 19, their concaved edges 20 will be effective to strip the bark from the slab, even though the curvature of the bark face of the slab be sharper than the curvature of the concaved edges 20 of the knives 19.

Having thus described the invention what is claimed is 1. In a device of the class described, a supporting structure; bearings slidably mounted therein; resilient means for supporting the bearings; a shaft journaled for rotation in the bearings; a rotary cutter upon the shaft; a frame pivotally supported upon the shaft; a chip breaker carried by the frame in advance of the cutter, and adapted to be raised and lowered by a tilting of the frame; and means for holding the frame in adjusted positions.

2. In a device of the class described, a supporting structure; bearings slidable therein; resilient means for supporting the bearings; a shaft journaled for rotation in the bearings; a rotary cutter upon the shaft; a frame pivotally supported upon the shaft; a chip breaker upon the frame, in advance of the cutter; a rock shaft j ournaled in the supporting structure and having an arm connected with the frame; movable means for actuating the rock shaft; and a device for locking said means in adjusted positions.

3. In a device of the class described, a cutter having a concaved edge; means for advancing the material across the concaved edge of the cutter; and a tilt-able member, adapted to engage the material to direct the same diagonally across the concaved edge of the cutter.

4:. In a device of the class described, a rotary cutter embracing blades having concaved edges; and a tiltable member adapted to engage the material, to change the angle of incidence between the material and the concaved edges of the blades.

5. In a device of the class described, a table; a rotary cutter operating adjacent the table, and comprising blades having concaved edges; and a lever fulcrumed upon the table, the lever constituting a guide to direct the material diagonally across the concaved edges of the cutter.

6. In a device of the class described, a cutter mounted for rotation in a fixed plane and comprising blades haying concaved edges; and a tiltable member mounted for swinging movement in a fiXed plane, the plane of swinging movement of the tiltable member, and the plane of rotation of the as my own, I have hereto aflixed my signaeutter hbeirig sulilstantlialklg at right angles ture in the presence of two witnesses. to eac 0t ier, t e ti ta e meIn er constituting means for varying the angle of inci- GUSTAVE ANDERSQN' dence between the material and the coneaved Witnesses: edges of the cutter blades. GEO. J. OLESON,

In testimony that I claim the foregoing WM. J. OLESON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

